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Message-ID: <000000000000f41cd905897c075e@google.com> Date: Wed, 22 May 2019 08:58:05 -0700 From: syzbot <syzbot+df0d4ec12332661dd1f9@...kaller.appspotmail.com> To: ast@...nel.org, aviadye@...lanox.com, borisp@...lanox.com, bpf@...r.kernel.org, daniel@...earbox.net, davejwatson@...com, davem@...emloft.net, john.fastabend@...il.com, kafai@...com, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, songliubraving@...com, syzkaller-bugs@...glegroups.com, vakul.garg@....com, yhs@...com Subject: kernel BUG at include/linux/scatterlist.h:LINE! Hello, syzbot found the following crash on: HEAD commit: af8f3fb7 net: stmmac: dma channel control register need to.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=17c2d418a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=fc045131472947d7 dashboard link: https://syzkaller.appspot.com/bug?extid=df0d4ec12332661dd1f9 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b53ce4a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14b0aa52a00000 The bug was bisected to: commit f295b3ae9f5927e084bd5decdff82390e3471801 Author: Vakul Garg <vakul.garg@....com> Date: Wed Mar 20 02:03:36 2019 +0000 net/tls: Add support of AES128-CCM based ciphers bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16915282a00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=15915282a00000 console output: https://syzkaller.appspot.com/x/log.txt?x=11915282a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+df0d4ec12332661dd1f9@...kaller.appspotmail.com Fixes: f295b3ae9f59 ("net/tls: Add support of AES128-CCM based ciphers") ------------[ cut here ]------------ kernel BUG at include/linux/scatterlist.h:97! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8868 Comm: syz-executor428 Not tainted 5.2.0-rc1+ #21 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:sg_assign_page include/linux/scatterlist.h:97 [inline] RIP: 0010:sg_set_page include/linux/scatterlist.h:119 [inline] RIP: 0010:sk_msg_page_add include/linux/skmsg.h:246 [inline] RIP: 0010:tls_sw_do_sendpage net/tls/tls_sw.c:1171 [inline] RIP: 0010:tls_sw_sendpage+0xd63/0xf50 net/tls/tls_sw.c:1230 Code: c6 c0 38 0d 88 4c 89 ef e8 aa 4c 89 fb 0f 0b e8 73 38 61 fb 4d 8d 6c 24 ff e9 92 f8 ff ff e8 64 38 61 fb 0f 0b e8 5d 38 61 fb <0f> 0b 45 31 ed e9 bc fe ff ff e8 4e 38 61 fb 83 85 c4 fe ff ff 01 RSP: 0018:ffff888091caf8f8 EFLAGS: 00010293 RAX: ffff8880a659e640 RBX: dffffc0000000000 RCX: ffffffff860f65b3 RDX: 0000000000000000 RSI: ffffffff860f6c13 RDI: 0000000000000007 RBP: ffff888091cafa48 R08: ffff8880a659e640 R09: fffff940004cac97 R10: fffff940004cac96 R11: ffffea00026564b7 R12: 0000000000000004 R13: 0000000000000001 R14: ffff8880a44f4e88 R15: ffff8880a57a6d00 FS: 000055555579e880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009b335000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: inet_sendpage+0x168/0x630 net/ipv4/af_inet.c:819 kernel_sendpage+0x92/0xf0 net/socket.c:3648 sock_sendpage+0x8b/0xc0 net/socket.c:946 pipe_to_sendpage+0x296/0x360 fs/splice.c:448 splice_from_pipe_feed fs/splice.c:499 [inline] __splice_from_pipe+0x38c/0x7d0 fs/splice.c:623 splice_from_pipe+0x108/0x170 fs/splice.c:658 generic_splice_sendpage+0x3c/0x50 fs/splice.c:828 do_splice_from fs/splice.c:847 [inline] do_splice+0x708/0x1410 fs/splice.c:1154 __do_sys_splice fs/splice.c:1424 [inline] __se_sys_splice fs/splice.c:1404 [inline] __x64_sys_splice+0x2c6/0x330 fs/splice.c:1404 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4413e9 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
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